Henry iranke



H. FRANKE. GRAVEL PAN.

N06 100,745, Pat ented Mar. 15, 1870 HENRY FRANKE, OF BROOKLYN, NEW YORK.

Letters Patent No. 100,7 45. datcd'JiIarc-h 15, 1870.

, enliven-Pan,

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may cancer-n Be; itkno'wn that I, Hnxm' FRANKIE, of Brooklyn, In the county of Kings, and State of New. York, have invented a new and improved Gravel-Pan; and

I dohereby-declare that the following is a full,'clear,

and exact description thereof, which will enable others skilled in the art tomake and use the same, reference being had to the accompanying drawing forming part of this specification. Figure'l represents a side elevation, partly 'in section, of my improved gravel-pan.

Figure! is a plan or top view of the same. I Figure Q3 is a vertical transverse-section of th same. v

Figure 4 is a front elevation of the same. Similar letters of reference indicate correspomllng parts.

y The object of this invention is to provide an apparatus on which gravel or sand used for roofing and paving purposes can be heated and dried in a continuone process.

The invention consists in the construction of a systern of heating-fines,together'with an open pan, in which the sand is contained, all parts being so arranged that the sand or gravel can be putinto-the pan at the top, and taken out at the open sides ready for use.

The advantages'of this invention are, besides rapidity and cheapness in the method of preparing the gravel fox-use, greaterthoroughness of operation and saving of; fuel.

A in the drawing represents the any of my improved pan. 1tissupported upon wheels B B, and is constructed as. follows:

A horizontal platform, a, made of sheet metal or other suitable material, forms the bottom of thepan,

and supports in the middle the longitiulinal heating channel b.

The top and sides of this channel I) are formed by a. plate shaped in cross-section like an inverted letter 'U, as shown in fig. 3, the lower part flaring outward,

t'o'guidej the gravel upon the outer part of the platform.

c is the front end plate or head of the pan, containing the fire-door d. p

e is the rear end plate of the pan.

0 Care two horizontal flues, supported, at their ends, in the plates 0' e, and connected, at their rear ends, by a T-shaped pipe, D, with the open rear end 'of the channel I).

The gases of the fire,passing backward in the channel I), enter through the piece 1) the lines 0, and pass forward in the same.

From the fi-out ends of the fiues O, the gases are, through a forked pipe, E, conducted into the smokestack 1*, which is supported above the front part of the pan, as shown.

The sides of the pan are formed by plates f f, that are nearly vertical, their lower parts being bent inwardly, as shown in fig. 3.

The pipes C, it will be seen, are nearer to the plates f than they are to the channel I), to have a smaller amount of gravel in this outer part than there is in the hottest portion of the pan between I) and C.

V The lower ends of the plate j do not reach to the platform 11-, but leave a slotted opening, through which the heated dry sand can escape upon the outer part of the platform, whence it is removed for use.

The moist sand is put into the apparatus at the top, and the dry hotsand is removed at the lower part, as specified.

Having thus described my invention,

I claim as new, and desire to secure by Letters P teut- 'lhe gravel-pan,containing the heat-channels b and O, and composed of the platform a and side plates 1; the latter not reaching down upon the platform, as specified, to operate asset forth. v

-Wit-nesses: HENRY FRANKIE.

Geo. W. Manna, ALEX. F. ROBERTS. 

